On Tue, 7 Oct 2025, BALATON Zoltan wrote:
The DP_GUI_MASTER_CNTL register has separate bits for src and dest but
we were only looking at the dest bit. Use the correct bit for source.

Ping?

Signed-off-by: BALATON Zoltan <[email protected]>
---
hw/display/ati_2d.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/hw/display/ati_2d.c b/hw/display/ati_2d.c
index 309bb5ccb6..e69b15b570 100644
--- a/hw/display/ati_2d.c
+++ b/hw/display/ati_2d.c
@@ -43,7 +43,8 @@ static int ati_bpp_from_datatype(ATIVGAState *s)
    }
}

-#define DEFAULT_CNTL (s->regs.dp_gui_master_cntl & GMC_DST_PITCH_OFFSET_CNTL)
+#define DFLT_CNTL_SRC (s->regs.dp_gui_master_cntl & GMC_SRC_PITCH_OFFSET_CNTL)
+#define DFLT_CNTL_DST (s->regs.dp_gui_master_cntl & GMC_DST_PITCH_OFFSET_CNTL)

void ati_2d_blt(ATIVGAState *s)
{
@@ -63,12 +64,12 @@ void ati_2d_blt(ATIVGAState *s)
        qemu_log_mask(LOG_GUEST_ERROR, "Invalid bpp\n");
        return;
    }
-    int dst_stride = DEFAULT_CNTL ? s->regs.dst_pitch : s->regs.default_pitch;
+    int dst_stride = DFLT_CNTL_DST ? s->regs.dst_pitch : s->regs.default_pitch;
    if (!dst_stride) {
        qemu_log_mask(LOG_GUEST_ERROR, "Zero dest pitch\n");
        return;
    }
-    uint8_t *dst_bits = s->vga.vram_ptr + (DEFAULT_CNTL ?
+    uint8_t *dst_bits = s->vga.vram_ptr + (DFLT_CNTL_DST ?
                        s->regs.dst_offset : s->regs.default_offset);

    if (s->dev_id == PCI_DEVICE_ID_ATI_RAGE128_PF) {
@@ -97,13 +98,13 @@ void ati_2d_blt(ATIVGAState *s)
                       s->regs.src_x : s->regs.src_x + 1 - s->regs.dst_width);
        unsigned src_y = (s->regs.dp_cntl & DST_Y_TOP_TO_BOTTOM ?
                       s->regs.src_y : s->regs.src_y + 1 - s->regs.dst_height);
-        int src_stride = DEFAULT_CNTL ?
+        int src_stride = DFLT_CNTL_SRC ?
                         s->regs.src_pitch : s->regs.default_pitch;
        if (!src_stride) {
            qemu_log_mask(LOG_GUEST_ERROR, "Zero source pitch\n");
            return;
        }
-        uint8_t *src_bits = s->vga.vram_ptr + (DEFAULT_CNTL ?
+        uint8_t *src_bits = s->vga.vram_ptr + (DFLT_CNTL_SRC ?
                            s->regs.src_offset : s->regs.default_offset);

        if (s->dev_id == PCI_DEVICE_ID_ATI_RAGE128_PF) {


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